modbus communcation error

[balatis]

Hello everyone ! 
I face an issue with modbus commmunication with a heat pump. I atttach you the script and manual.
I checked it with the app "modbus polling", it works properly and I read data from the pump.

But via lm i have no communication.
Have you any idea about it ?

The json-profile:
{
    "manufacturer": "GREE",
    "description": "pump",
    "mapping": [
   
    {
    "name": "Water Tank Temperature",
    "datatype": "uint16",
    "type": "register",
    "address": 13,
    "unit": "°C"
    }
  ]
}

[Daniel]

Start by using Read test, check wiring and correct RTU settings.

[balatis]

Start by using Read test, check wiring and correct RTU settings.

We have already done these steps, but no response.
The wiring and the rtu settings are correct.

[Daniel]

Did you try swapping A/B?

[balatis]

Did you try swapping A/B?

Yes, we tried but nothing changed.
We connected it to port 2 in the same LM and it works properly.
After that we changed LM and it works properly in port 1, because in this project we use port 2 for ekey.
So, the port 1 does not work in the first LM.

[Daniel]

OK then contact us via email for replacement.